Liquid dispensing apparatus



Oct. 7, 1941. R. J. JAUCH ET AL LIQUID DISPENSING APPARATUS Filed April e, 193s ZOw` ` 'Zoll Patented Oct. 7, 1941 LIQUID DISPENSING `APPARATUS Robert J. Jauch, Fort Wayne, Ind., and Howard Somervell, Evanston, Ill., assignors to The Wayne Pump Company, Fort Wayne, Ind., a corporation of Maryland Application April 6, 1938, Serial No. 200,292

` (ci. ius-113) 2 Claims.

This invention pertains to liquid dispensing apparatus and pumping means to be used in connection therewith, or in connection with installa- 'tions for dispensing liquid as in filling stations, or in connection with installations dispensing large quantities of liquid rapidly and efliciently as in bulk station installations, city pumping stations, and the like.

It is an object of this invention to provide a liquid dispensing apparatus wherein entrained air is separated from the liquid to be dispensed before the apparatus is operable to dispense clear liquid.

Another object is to provide a liquid dispensing apparatus wherein liquid is dispensed only after a predetermined pressure is built up.

Still another object is to provide a liquid dispensing apparatus so constructed and arranged that entrained air is separated on the suction side of the pump.

Yet another object is to provide a liquid dispensing apparatus which is self-priming.

A further object is to provide a liquid dispensing apparatus wherein the removal ofl entrained air is effected through the use of an ejector.

A still further object is to provide a liquid dispensing apparatus wherein entrained air is eliminated through use of an ejector where the ejector may be controlled after air elimination. l

With these and various other objects in View, the invention may consist of certain novel features of construction and operation as will be more fully described and particularly` pointed out in the specification,` drawing and claims appended hereto.

In the drawing, which illustrates embodiments of the device and wherein like reference characters are used to designate like parts- Figure 1 is a fragmentary elevation, more or less diagrammatic, showing a portion of the liquid dispensing apparatus embodying the invention;

Figure 2 is an elevation corresponding to Figure 1 showing another modified form of the invention;

Referring to the forms oflconstruction illustrated herein, it is of course to Abe understood No. 2,111,996, granted March 22, 1938. In the constructions illustrated herein, where they are used in a liquid dispensing apparatus, it is of course understood that the pump 22 is adapted to be Vconnected to a suitable source of supply (not shown) through the suction tube 20, and in general the outlet side of the pump is connected through air separating means to the meter which drives indicating mechanism, the outlet side of the meter being connected through a suitable sight gauge to the usual dispensing hose and nozzle assembly.

Referring first of all to the modification illustrated in Figure 1,the outlet side of the pump 22 is connected to one end of the conduit |42, the

other end of` which'is connected to the inlet |44 of the air separator |46. In general the pump shown is a self-priming, positive displacement rotary pump including a casing having the impeller 24 driven by the usual motor (not shown) through the pulleyv 26. The casing is provided with the suction chamber 28 and the pressure K or outlet chamber 30. The bypass chamber 32 is connected to the suction chamber 28, and the spring-pressed valve 34 is adapted to permit bypass of liquid from the pressure chamber to the suction chamber when a predetermined pressure is built up in the pump. The separator |46 is provided with the chamber |48 provided with said inlet and with an outlet |50 separated by means of the baille |52. The air separator is also provided with `the jet chamberf|54 connected to the chamber |48 through the Venturi jet |56,

r thereof.

that in th/ese forms wherein the pump assembly is A used in a liquid dispensing apparatus, said apparatus is adapted to be provided with a suitable casing such asillustrated in application Serial No.

2,282, filed January 17, 1935, and a meter similar -to that illustrated` in application Serial No.

85,426, filed :June 15, 1936, may be used-to drive the inlet or larger opening being from the chamber |48. The jet is aligned with a Venturi tube |58, said jet and tube forming an ejector cornmunicating with the4 upper dome |60 of the float or atmosphere chamber |62, the dome |60 being preferably provided with baffles |64 disposed between the ejector and the vent tube |66 extending upwardly and, in the case of a pump, preferably to the upper portion of the casing The fioat |68 is disposed within said float chamber, being provided with the guide |10 in cooperative engagement with the stationary guide member |12 provided in said chamber, and said iioat is pivotally connected as at |14 to the lever |16, the other end of said lever being pivotally connected as at |18 tothe bracket |80 provided `in the chamber |62.

A valve rod` |82 is pivotally connected as at |84 to the lever |16 intermediate the ends thereof, and is provided with the valve |86 controlling the passage |88, said passage being conregistering mechanism such Aas shown in Patent 55A nected to the conduit |90 connected to the inlet side of the pump. A conduit |82 is connected as at |84 to the jet chamber |84, the other end of said conduit being connected as through the one-way valve |88 to the pump. The conduit |82 may be provided with the connection or restricted conduit 218 connected as at 282 to the outlet side of the pump adjacent a high point thereof. The outlet |88 of the air separator is connected to the conduit |88 provided with the diuerential valve 288, said differential valve being connected through the conduit 202 to the inlet side of the meter 204, the outlet side of the meter being connected through the conduit 208 to suitable dispensing means such as the hose and nozzle assembly referred to. The meter shaft 208 is adapted to rotate in accordance with liquid passing through the meter, and operates registering mechanism or computing mechanism as described in said Patent No. 2,111,996. The diiferential valve 208 is provided with the valve member 2|0-2I2 having a spring 2|4 disposed normally urging said valve toward closed position. Below the valve member the conduit 2|6 is connected, the other end of said conduit being connected to the inlet side of the pump.

In operation of this formof the device, operation of the pump causes the liquid and vapor to be supplied to the chamber |48 through the conduit |42. The valve 200 being closed, the liquid and vapor will pass through the jet and ejector tube into the dome |60 whence the liquid will be precipitated into the chamber |62 and the vapor will pass through the vent |66. Passage of liquid through the'jet and ejector tube will cause a vacuum in the chamber |54 whereby suction will be caused in the conduit |82 removing the vapor from the pump. This vacuum also exhausts vapor from the pump outlet through the restricted conduit 218, but little or no liquid is supplied to the ejector due to the disposition of conduit 2'18 and the fact it is of smaller size than the conduit |82. I'he one-way valve of course prevents the suction of the pump when by-passing solid liquid from reversing flow in the conduit 214 or tending to destroy the action of the ejector. After the liquid has reached a certain level in the chamber |62 the valve |86 will be opened by the float |88 and the liquid will be returned through the conduit |80 to the inlet side of the pump. When the pump is pumping solid liquid, the vacuum created below the lpiston 2|2 of the differential valve, together with the pressure of solid liquid from the air separator, will cause the differential valve to open whereby the liquid may be measured and dispensed.

In the construction illustrated in Figure 2, the inlet side of the pump is connected through the manifold 2| to the inlet pipe 28, said manifold serving to maintain a predetermined amount of liquid in the pump casing, it being understood that said manifold or an equivalent thereof may be used with all modifications shown herein. I'he outlet side of the pump 22 is connected to the conduit 2|8, which in turn is connected to the jet 220 provided in the jet chamber 222, the jet chamber being connected as at 224 to the conduit 228, which in turn is connected to the pump 22 preferably to a high point in said pump as through the one-way valve 228. Disposed in the jet chamber and aligned with said jet there is provided an ejector tube 280 forming an ejector with said jet, connected to the conduit 282 which in turn is connected to the inlet 234 of the chamber 286 of the air separator 288. 'Ihe chamber 286 is provided with the outlet 248 separated from the inlet by means of the baille 242 and the upper portion of the chamber 236 is provided with the restricted orifice 244 communicating with the dome 248 of the float chamber 248, the dome being preferably provided with baiiies 258 disposed between the orifice 244 and the vent 252. The iioat 254 is disposed in the iioat chamber 'as before, being guided by the member 256 and the stationary member 258.

The float 254 is operatively connected to the outer end oi the lever 280 as at 262, the inner end of said lever being pivoted to the bracket 284. The lever is connected to the valve rod 266 provided with the valve 268 controlling the discharge 210 which is connected to the conduit 212, the other end of said conduit being connected to the inlet side of said pump. The. outlet 248 of the air separator is connected to the conduit |88, the di'erential valve 200, the meter 284 and the outlet 286, the meter being provided with the meter shaft 208. The differential valve is connected to the conduit 2|6, which in turn is connected to the inlet side of the pump as described in the construction illustrated in Figure 1.

In the operation of this form of the device, liquid and vapor in being discharged from the pump passes upwardly through the jet and ejector tube, causing a vacuum to be formed in the jet chamber, whereupon a suction will be caused in the conduit 226 to remove the vapor from the pump 22. The liquid and vapor passing into the chamber 286 causes the vapor to be released through the oriiice and the vent 252. 'I'he liquid precipitated in the float chamber is returned through the conduit 212 when the valve 268 is opened by the iloat 264 permitting liquid return to the inlet side of the pump. After the predetermined pressure has been built up, the diiferential valve 208 will open, permitting supply of liquid to the meter and dispensing means.

Although a diiferential valve is illustrated in the various constructions, it is of course understood that a spring pressed poppet valve may be used in place of the valve 208, in which case the spring is set so that the valve will only open when the pump is pumping solid liquid.

It is to be understood that we do not wish to be limited by the exact embodiments of the device shown, which are merely by way of illustration and not limitation, as Various and other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims.

What is claimed is:

1. In a device of the character described, the combination of a pump, the suction side of which is adapted to be connected to a source of liquid supply, an air separator having an inlet and an outlet, a connection between the inlet of said separator and the outlet of said pump, the outlet for liquid from said separator being adapted to be connected to a meter, said separator having a plurality of chambers, one of said chambers having said inlet and outlet, another of said chambers having a restricted vent to the atmosphere and an overflow outlet, said overiiow outlet being connected to the suction side of said pump, said separator having a jet chamber interposed between said ilrst named chambers, a jet connecting said Jet chamber and said rst named chamber, an ejector tube connecting said jet chamber and said second named chamber, and connecting means between said jet chamber and the inlet and combination of a pump, the suction side of which is adapted to be connected to a source of liquid supply, an air separator having an inlet and an outlet, a connection between the inlet of said separator and the outlet of said pump, the outlet for liquid from said separator being adapted to be connected to a meter, said separator having a plurality of chambers, one of said chambers posed between said rst named chambers, a jet connecting said jet chamber and said rst named chamber, an ejector tube connecting said jet chamber and said second named chamber, and

connecting means between said jet chamber and the inlet side of the pump whereby liquid passing through said jet and ejector tube causes a vacuum condition in said jet chamber to remove vapor from said pump through said last 1o named connecting means.

.. ROBERT J. JAUCH.

HOWARD SOMERVELL. 

